Application of the Hygrometer (900-901D1) A-3
4/9/98
Moisture Monitor Hints (cont.)
Some of the most frequently encountered problems associated
with moisture monitoring sample systems include:
• the moisture content value changes as the total gas pressure
changes
• the measurement response time is very slow
• the dew point changes as the fluid temperature changes
• the dew point changes as the fluid flow rate changes.
GE Panametrics hygrometers measure only water vapor pressure.
In addition, the instrument has a very rapid response time and it is
not affected by changes in fluid temperature or fluid flow rate. If
any of the above situations occur, then they are almost always
caused by a defect in the sample system. The moisture sensor
itself can not lead to such problems.
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